Very interesting game and a great atmosphere! I had played this for a while and walked around and found a mask effect, as I got to the mermaid by the water I didn't know what I was supposed to do so I tried pressing a few different things and ended up with an error. I had to restart the whole game again and I tried finding the error.
In the menu if you press on options and then "X" you will get an unknown error. I don't know if you're aware of this so I thought I'd tell you about it :)
edit: I played the game on a Mac
Other than that I really enjoyed the eerie feeling to the game and the art style was very fitting.
I don't know if you've heard of Game Development World Championship before (gdwc2019) but it's a competition for indie game developers where they can submit their games and it's free! It's great if you want some more visibility for the game and it only takes a couple of minutes to join :)